TITLE: Simple Harmonic Motion

COMPOSER: Daniel Koppelman

DATE:  1991

DURATION: ca. 5:30

ADDRESS:  1508 North Drive; Mt. Pleasant, MI 48858

PERFORMANCE REQUIREMENTS (SCORE, PERFORMER, ETC.):
No score.  Live improvised performance by two disklavier players, one
on the keyboard and the other "inside the piano."

ADDITIONAL EQUIPMENT (SYNTHESIZERS, PATCHES, ETC.):
Korg Wavestation.  Patches are available from the composer in
Galaxy format.

SETUP (EQUIPMENT ARRANGEMENT, ACOUSTICS, LIGHTING, ETC.):
your good judgement.

PROGRAM NOTE:
The work contains both composed and improvised elements: certain pitch
materials (most notably a basic 8-note cell), all the synthesizer patches,
and the pacing of major events are fixed; the computer at times chooses
randomly from among given materials; the keyboardist alternately improvises
around the basic cell and responds freely to the computer's output; and the
inside player improvises freely throughout (using fingers, fingernails, and
metal beaters directly on the strings and frame.)  Multiple performances will
therefore resemble each other in pitch-class content, sonic design, and
overall architecture while remaining distinctive in surface detail.